node.js 之async.js 里waterfall模块样例

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 * Created with JetBrains WebStorm.
 * User: hexie
 * Date: 12-12-6
 * Time: 上午9:58
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 */

var async = require('async');

async.waterfall([
    function(callback){
        callback(null, 'one', 'two');
        console.log('1');
    },
    function(arg1, arg2, callback){
        callback(null, 'three');
        console.log(arg1);
        console.log(arg2);
    },
    function(arg1, callback){
        // arg1 now equals 'three'
        callback(null, 'done');
        console.log(arg1);
    }
], function (err, result) {
    console.log(result);
    // result now equals 'done'
  //  console.log('4');
});

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